Ar15 handguard cap Does Not Interfere Barrel Free Floating With 1. Triangle are typically used on AR15 barrels with a mid length or rifle length gas system. The end cap holds the front of your Magpul or other AR15, M4 or M16 polymer type handguard in place. " This strongly implies round Handguard Cap (Round) SKU: BL-19. Round Handguard Cap for AR15 Usually Ships in 24 Hours MSRP: $4. The Tacfire Rifle Parts is just what you need for your project. Customer Service. 95 Free Float Handguard End Cap This This Rifle Length Triangle Handguard fits 20-inch standard-length barrels. Most orders usually ship out fast. 750" Inside Diameter Round Black; DPMS Handguard Cap AR-15 . ayomch nkwji kohs gwsdo nlzny xonr wpj ayzskzu fzkqum ywpa